Safety appliance for steam-boilers.



No. 666,265. PATENTEDSBPT. 17;-1907. r H. GRIPPEN. f"

vSAFETY APPLIANGE FOR STEAM BOILERS.

APPLIOATION'FILED JULY 17, 1903.

mi E? Wi e. 1'* Attorney tionalview of a steamboilerfprovidedy with asafety steamjzboilers and more especially to that class of such ldevice/s` particularly applicable to boilers employing a f .vention to,produce an appliance of this character 15' terrupted or cut o ff shouldthewater level within the; boiler reach a predetermined stage, and alsoto provide I hereinafter morefully described and .device embodyingmy`said invention. Fig; 2 is a cen; tral vertical sectional viewy takenlongitudinally 3o' sition ofv the parts after operation.

, 2. Passing directly over this' burner, and entering the crown sheet ofthefboiler, is a pipe 3, the upwardly' extendingportionv4l thereof'beingconne'cted to the ,40 I

scription vof the same, reference being had to the `ac'- companyingdrawings, forming a part of this specifica-l uninterruptedA pending thereadjustment of the parts` ofthe appliance.

'the claims hereunto appended.

,y In the present embOdnientomyinVention des; 35

. The length of this pipe i may be varied under differ-V ent conditions,but in all cases will be of a length equal to the..height of thelextremelow water level, or the lowest level atwhich it is safe to run theboiler. l 45 burner-2is a fitting or casting 5, provided with an ap- -fUNITED s TArES AIENT OFFICE.,

"HERBERT oRrrrEN'-, or RocHsTER,'NEW YORK(- SAFETY APPLrsNcE- Fon'STEAM-normas.

To all whom it may oo'nm:

Be it known that I, HERBERT CnrrrEN, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Safety Appliances. for Steam-Boilers;' and I do herebyvdeclare the following to be a full," clear, and exact'detion,andtotheneference numerals 'marked thereon. Mypresent inyention relatestosafety appliancesfor liquid or gaseous fuel; and it is the object ofmy inwhereby the supply of fuelwill be automatically in means wherebythe device may be reset to restore the fuel supply so that the serviceof the boiler may be Otlier'eature's ofV novelty advantagewill bepointed out in i Injthe drawingsz`` Fig'iire 1. is acentral 'ertical secthrough the device, "sho`wijng the parts 4in the normal position, andFig.' 3 'is 1a similanview showing the po Similar reference numerals inthe indicate similar parts'.`

ignates the shell 'of a steam boiler of any suitable type, beneath whichis` located ,any suitable form of burner pipe- 3, within or above thecrown sheet ofthe boiler.

Upon thev opposite end of the" pipe23 outside the erture 6 within whichis threaded or otherwise secured 9 tothe pipe '10, throughthe boilershell `and provided with an upturned portion 11 terminating atSpecification of Letters Patent.n Application iiled July 17,1903. Serial110.186.032;

[held Patented sept. 17, 1907'.

with the atmosphere is controlled by A screw threaded aperture isprovided in the fitting or casting 5, substantially in alinement withthe pipe 3, and into this aperture is fitted the plug 17, carryingburner. Fitted within this tube 18, and extending through the plug 17isy a rod 19, preferably provided 'upon one end with thefcormgation's20. This rod 19 the screw threadi ed lplug 14, provided with thepassage15.

the tube or sleeve 18, o f a reduced size, and extending s into the pipe3, until the end thereof rests above the normally occupies the positionshown in 2, and is tweenthe end of said rod19 andI thetube 18 and 'mcomposed of any suitable alloy or other material melting ata'comparativelylowtemperature; As the rod yretained from operation bylthe vfuse 21', .interposed bef 1 9 passes through the plug- 17,ajstufi'ng-box 22 i's pro vided to forma tightv joint. At the extremityof thisf rod19 is formed one ofthe members 23 oi a connecting u beingemjoint, screw-threads or other suitable means ployed in securingt-hesame to said 1 v Extending laterallyfrom the 5 are a pair of'diametri'cally disposed lugs 24-24 provided-with relv cesses 25-25.Iritothese rec, 25-25 adapted 'torest the extremities ofthe arms 26-26of theframe 2,7. `Mounted,longitudinally of this frame 27 is a valvejstem 28 carrying at one end the connecting .member 29 connected tothecorrespondingmember 23 by the` removable screw or pin 30, to form ajoint. Adjacent:`

this member` 29 the valve stem.28 is screw-threaded, as at 31, and overthese threads is fitted the thumb nut 32 normally occupying thepositionindicated in full4 v I lines in Fig. 24 Adjacent this thumb. screw 32 isan abutment 33,` which the stem 28 isslidingly tted. Upon one side of.this abutment is provided Aa side thereof is providdla spring4 seat 34.

Upon the valve stem 28 is provided a stop 35 against spring being tomove said rod 19 and the stem 28 to theVY seat 33"* for the thumb-screw32, andupon the opposite which abuts the spring seat 36. Between thespring` seat 36 and the-spring seat 34 the helical :ompression spring 37is interposed, fthe normal tendency of this left.4 Howeventhe fusibleconnection 20 between the` tube 18 and the rod 19 normally retains theparts inthe position shown in Fig. 2.

Upon the-end of the valve stein 28 `is screw-threaded` or otherwisesecured the needle valve plug l38 provided with a `valve seat 39 adaptedto register with the valve s'eat 40`injthe casting 41 to form a cut-offfor the fuel supply. This casting 41 is ,provided with anexternally-screw-threaded extension( 42, screw-threaded into the endof'the frame 27, in aiinement with the yalve stem 28. extension 42 isformed hollow and 'into this hollow portion may be fitted the guideorsup .'port 43 for the'. valve stem 28., A stung-box gland 1.10 44isalso fitted: -withinthis hollow extension, being;

in :the capnuttscrew-th'sded upon'.

the extension 42, to form a tight joint through which the valve stem 28may slide.

Leading from the valve seat 40 in the casting 41, is formed a passage46, passing through thefextension 47 of the casting, said extensionbeing externally screwthreaded, over which is fitted the nut 48,carrying the coupling piece 49 secured to the pipe 50 connected to areservoir or other source offuel supply.

Perforating the casting 41 above the valve seat 40 is provided a passage51 leading through the extension 52, said extension being also providedwith any suitable form of coupling, such as 53 and 54, connected to thepipe 55, leading to the vaporizing retort 56 and burner 2, both of whichmay be of any suitable type.

In proximity'to the thumb-screw 32 is a stop of any i suitableconstruction, said stop in the present embodi- Ament consisting of athumb screw 57 provided with a screw-threaded stem 58 passing throughthe-frame 27 and engaging the thumb nut 32 to prevent rotation of saidnut upon thestem 28, when said parts are in the position shown in Fig.2.

Under ordinary conditions evaporation of water within the boiler willnormally take place frbm a level in proximity to the dotted line,Fig. 1. Under these conditions a constant circulation of water will bemaintained through the pipes'lO, 7, fitting or casting 5 and pipe 3,entering the pipe 10 from the boiler, passing around the elbow 8 anddown the pipe 7, through the casting 5 between thetube 18 and the pipe 3and back into the boiler through the extension 4. This circulation isset up and maintained by the superheated water in the pipe 3, locateddirectly above the burner, rising, causing water at a comparativelylower temperature. to passdown into the inlet pipe l0. Under normalconditions this circulation will continue. However, should the waterlevel fall to the level of the tops of the inlet and outlet pipes 10 and4 respectively, it will'be obvious that the circulation of water throughsaid pipes will befinterupted, and the water remaining in the .pipe willbe quickly evaporated or dispelled by the heat of the burner directlybeneath. Heretofore the fuse 21 will be protected by the water passingthrough the pipe 3,I the temperature of which is considerablyl below thefusing-point of the fuse. However, when the water has been dispelledfrom said pipe 3, the tem# perature thereof will rapidly rise, andcommunicating its heat to the fuse 21, -will melt the same, breaking theconnection between said tube 18 and the rod `19, releasing the said rod.As the valve stem 28, under tension of the spring is connected to, andnormally retained in operative position by the rod 19, it will now bereleased, and acting under the influence of the spring 37 will be thrustto the left causing the needle valve 38 to seat itself upon the valveseat 40, cloing communication between the supply pipe 50-iand the pipe55 .leading to the burner and consequently causing the burner to beextinguished. f. Thus it will be'lseen that the source of heat-isremoved when the' water level falls to such a degree asto endanger thelcrown sheet, tubes or other parts of the boiler through overheating,

vand to eliminate 'danger from all possible sources, such as the suddenentrance of feed water under illch conditions. As the source of h eat isremoved from the` boiler, the same will now rapidly cool, and the waterlevel may thenbe restored to its normal working level.

provided, upon the -screw-threaded portion 31 of the i stem 28, whichmay be rotated after the set screw 57 has been retracted, to cause thecut off or needle valve to restablish communication between the supplypip 50 and the pipe 55 leading to the burner. l

ln order to renew the fusible connectionl 2l, the pin or screw 30connecting the rod 19 and the valve stem 28 is removed and the plug 17is unscrewed from the casting or fitting 5, when the rod 19 and the tube18 will both be accessible. After the fuse connection between the end ofthe rod 19 and the tube 18 has been renewed,

- said plug may be replaced vin the casting 5, and the parts restored tothe position shown in Fig. 2, when the needle valve 38 will be held openand the device will be again in its operative position. i

The valve plug 14 is provided for draining or blowing off the'pipes 3and 7, to remdve sediment or to withdraw the water therefrom afterblowing off the boiler.

While I have illustrated and described certain pipe connections andfittings inthe present embodiment, itA will of course be understood thatany suitable connec-v tions may be employed as desired. Y l

It will also be understood that l do not limit myself to the details ofconstruction ,herein shown and described, as many modifications andchanges might be made, which modifications and changes could be madewithout departing from the spirit of my invention.

I'claim as my invention- I 1. The combination with a steam boiler, awater chamberrzaommunicating wit-h `tshe water space of said boiler anda burner having a tuei supply, of a part projecting into said waterchamber, a cut-olf for the fuel supply including a valve 'and a stemtherefor also projecting into the chamber, anda fusible connectionbetween the valve stem and the .projecting part for normally retainingthe valve in open position.

2. The combination with a steam boiler, a burner therefor having a fuelsupply connected thereto and a water chamber enposed to the 'heat of theburner, of a cut-oft valve for the fuel supply having its valve stemprovided with a'detachable partprojecting into the water chambei` of theboiler, a sleevealso projecting into the water space of the boileradjacent to the stem, a thermally con trolled device normally connectingthe said stem andsleeve, and a detachable part containing the sleeveand` the detachable part of the stem;

3. The combination with a steam boiler, a burner therefor having a fuel`supply connected thereto, and a water chamber communicating with thewater space of the boiler and exposed to the heat of the burner, of acut-on valve for controlling the fuel supply located exteriorly of theboiler` and having a stem with a parvtextending into the water chamberthereof, a sleeve lnc'losing said stem, and

,a fusible 'substance normally sealing the bore of `the' the boiler, acutolf valve for the fuel supplyhaving a stern with a part extendingthrough the fitting into `the water spaeeof the boiler, means normallytending to operate the stem, a sleeve secured to the iitting andsurrounding the stem, `and a,fusible.substancenormally seal-- between thsleeve and stein.

, ing the bore of the sleeve and serving as a .connection l 5. Thecombination Awith a steam holler, and a bui-ner v therefor having fuelsupply connected thereto, of a hollow tting'secured to the Aboiler, and.communicating with the Vwater agace thereof, a'plug detachablefrom thefitting and carrying relatively iixd and movableI members,

a thermally-,controlledconnection between said members,

- frame having arms adapted to4 coperate with said .valve stem guided insaid frame and connected to the optween the valve and tting.

fthe fitting, a` valve for the fuel supply having a part conthe sleeveand extending loosely through the plug, a. fusible 'for havinga fuelsupply connected thereto, of a hollow .means for reopening said cut-onfindependently of the re- 'a releasing device to. permit the closing. ofsaid fcut-oft `upon 'the interruption of circulation through said pipe,

l scopes and a valve lin the fuel supply controlled in its operation bysaid movable member. v

6. The combination with a steam boiler, and a burner therefor having afuel supplyconnected thereto, of a fitting' having portionscommunicating with the boiler and exposed to the heat of the burner, aplug detachable from the Iitting and carrying relatively stationary landmovable members, a thermally-controlled connection between ythe saidmembers for normally preventingtheir relative movement, and a. valve forthe'fuel supply having its stemconnected to said movable member.

7. The combination with a boiler, and a' burner therefor having a fuelsupply connected thereto, of va fitting having portions communicatingwith the 'boiler and exposed to the heat of the burner, a plug' having asleeve thereon projecting into'the fitting, a stem inclosed by thesleeve and extending through the plug to the exterior of trolled bythesald stem, and a thermallycontrolled connection for normallypreventing relative movement of the stem and sleeve. v

8. The combination with a boiler, and a burner therefor having a fuelsupply connected thereto, of a iitting having portions communicatingwith the boiler and `ex-- posed to the heat of .the burner, a plugdetachable from the fitting having aV sleeve iix'ed thereinandlprojecting into the fitting, a relatively movable `stem surroundedby .v

connection between the sleeve and stem for normally pre-` ventingrelative movement between themand a valve for the fuelsupplycontrolledby the said stem.

.9`. The combination with a heilen-and a burner therefitting, pipesconnected at their outer ends by said fitting and having their oppositeends extending vertically to a -given level within the boiler, one ofsaid pipes Abeing exposed to the heat of the burner, athermally-controlled device arranged with one of said pipes, andal valvefor thev fuel supply controlled in its operation by saidtherwally-controlled device.

10. The combination with a steam boiler and a burner having a fuelsupply-connected thereto, of a water chamber connected to said boilerand exposed to the vheat of the burner, a cut-oil? interposed betweensaidfuel supply and burner, An releasing device to permit the closingofgsaid cut-oit' during the absence of water in ysaid chamber, and

leasing device.

11. The combination with a steam boiler and a burner having a fuelsupply connected` thereto, of a water circu lating pipe connected tosaid boiler and exposed to the heat of the burner, a cut-oit interposedbetween said fuel supply and burner, a spring operating to close saidcut-oif,

and means for overcoming the action of said spring and reopening saidcut-olf. i

12. The combination with a boiler, and a burner therefor having a fuelsupplyv connected thereto, of a hollow f fitting having communicationwith the boiler and provided with laterally-arranged lugs thereon,althermallycontrolled device carried by said fitting and having anoperating part extending to theex-terior of the latter, a-

lugs, on the fitting, a valve for the fuel supply, and` a erating partof the thermally-controlled device. v

13. The combinationvwith a boiler, land a burner therefor having a fuelsupply connected thereto, of a hollow fitting 'having communication withthe boiler and provided with a part exposed to the heatlof they burner,a rod extending into the fitting, a thermallylcontrolled device fornormally preventing movement of the rod,l a valve for the fuel supply, astem for operating `the valve having a detachable connection with thesaid rod, and a frame serving to guide the said stem and as aconnection'be 14. The combination with a steam boiler, and a burnertherefor having a fuel supply connected thereto, of a water -catedwithin the water chamber and connecting .eating with the water space ofthe boiler, a cutbif located in the fuel supply having a relativelymovable operating portion extending Ainto the water chamber and va fuselocated in said chamber connected to saidl operating portion to normallyrestrain its operation. 1 y85 15. In combination with a steam boiler anda burner therefor having a fuel supply connected thereto, of a waterchamber communicating with the water space of the boiler, aient-oil?located in the fuel supply having a relatively movable operating member,and a removable plug fitted in the water chamber having a relativelyfixed `projection extending into the water chamber, a relatively movableportion extending into said chamber and connected to the operatingmember of the cut-off and a fusible substance losaid projection andmovable portion.

16. In combination with a steam boiler-a burner there- I for'having afuel supplyn connected thereto, and a water chamber communicatingwiththe water space of the boiler, of a cut-off located in the fuel supply,a relatively movable operating member therefor, a plug removably tiltedin said water chamber having a hollow portion projecting therein, alongitudinally movable portion located within said hollow portion andconnecting with the operating portion of the 4cut-oli?, and a fusibleconnection within the said chamber and normally connecting said hollowand movable portions.

17. In combination with a steam boiler, a burner therefor havinga fuelsupply connected thereto, and a water chamber communicating with thewater space of the boiler, of a cut-onf located in the fuel supplyhaving a relatively movable operating member, means normally actingthereon to close the cut-olf, and a plug removably fitted in theY Waterchamber having a hollow portion projecting therein, a longitudinallymovable portion mounted in said hollow portion and connected to saidoperating member, and a fusible connection between said hollow andmovable portions normally serving to retain the latter in rclative'lyiixed relation. Y

18. The combination with a steam boiler, a burner therefor having a fuelsupply connected thereto and awater chamber communicating with the waterspace of the boiler, of a valve located in the fuel supply having amovable operating member, means normally acting thereon to close thevalve, a plug removably fitted into the water chamber having a tubularextension thereon, a rod movable longitudichamber exposed to the `heatof said burner and communinally within said extension and connected tothe operating Amember of the cut-olf and a thermally controlled devicefor normally retaining retracted positions. I

19. The combination with'a steam boiler, and a burner the rod andoperating member in their therefor having a fuel supply connectedthereto, of a water circulating chamber extending through the combustionchamber' of the burner and communicating at different points withthe'water chamber of the boiler, a cut-off located initheflel supplyhaving an operatingmember, and a fuse controlled by the temperaturewithin said chamber for controlling the operation of thevalve operatingmember. l

20. The combination with a steam boiler, and a burner thereforv having afuel supply connected thereto, of a water circulating pipe extendingabove -the burner and communicating at both ends with the water space ofthe boiler, a cut-om'in the fuel supply having a valve stem extendinginto said pipe and normally operating to close the cut-off and meanscontrolledby the temperature within the said pipe and connected directlyto the valve stem for retaining the stem in its retracted position.

21... The combination with a steam boiler, a burner there' for having afuel supply connected thereto, and a water chamber communicating withthe water space of the boiler and exposed to the\heat of the burner, ofa cut-off valve located in the fuel supply, a longitudinally movablevalve stem for operating the latter, a relatively xed tubular extensionprojecting into the water chamber, a longitudinally l movable rodmounted within the tubular extension and movable withthe valve stem, andmeans controlled by the temperature .within the chamber for normallyretaining said rod und extension in fixed re'lation.

22. In a safety appliance, the combination with s.

steam boiler, and a burner having a fuel supply connected thereto, ofcirculating pipes extending through the conlbustion chamber of theburner and having their apertures located at a predetermined heightwithin said boiler, a fitting connecting said pipes through which Waterfrom said boiler normally circulates, a stationary member located in oneof said pipes, a movable member, a fusible` connection between saidmembers, and a controlling device connected to said fuel supply, andadapted to be released by said movable member to interrupt the fuelsupply after the circulation through said pipes ceases.

23. In a safety appliance, the combination with a steam boiler. and aburner and fuel supply connected thereto, of circulating pipes exposedto the heat.of the burner and having their apertures located at apredetermined height within said boiler, a tting connecting said pipesthrough which water from said boiler normally circulates, a plugcarrying a stationary and a movable membertted in said fitting, afusible connection between said members, and a controlling deviceconnected to said. fuel supply, and adapted to be released by saidmovable member to interrupt the fuel supply after the circulationthrough said pipe ceases. f jf 24. ln a rsafety appliance, thecombination with-a s'tea boiler, and a burner having a fuel supplyconnected thereto, of circulating pipes exposed to the'heat of theburner and having their apertures located at a predetermined heightWithin said boiler, a .fitting connecting said pipes through which waterfrom said boiler normally circulates, a stationary member located in oneof said pipes, a movable member, a fusible connection between saidmembers, and :l controlling device connected to said fuel supply, avalve` stem for operating said device adapted to be released by saidImovable member to interrupt the fuel supply after the circulationthrough said pipes ceases, and a retracting device operating upon saidstem for restoring the fuel supply.

25. ln a safety appliance, the combination with a steam boiler, and aburner having a fuel supply connected there.

to, of circulating pipes exposed to the heat of the burner and havingtheir apertures located at a predetermined height within said boiler, afitting connecting said pipes through which water from said boilernormally circulates, a plug carrying a stationary and a movable memberfitted in said fitting, a fusible connection betwen said members,

and a controlling device connected to said fuel supply, and adapted tobe released by 'said movable member to interrupt the fuel supplyafterthe circulation through said pipes ceases and var retracting devicefor said controlling device to restore sadtuei supply.

26.v The combination vwith a steam boiler, a burner therefor and a fuelsupply connected thereto, of a water chamber communicating with thewater space of the boiler, a frame connected thereto having a cutoffvalve at one end thereof connected -in the fuel supply, a valve stem.movable longitudinally of the frame for operating the, cut-off, a springinterposed between the frame andthe stem for operating the latter, anextension connected to said stem and 'extending into said water chambera relatively fixed member projecting into said water chamber, and meanscontrolled Vby the ytemperature of the water chamber for normallyconnecting said extension and fixed member and thereby retaining thevalve stem retracted.

27. The combination with a steam boiler, a burner therefor having a fuelsupply connected thereto, and a water chamber communicating with thewater space of the boiler, of a cutoff valve located in the `fuel supplyhaving an operating stem, a spring for operating said stem toI close itsvalve, and a plug removably fitted into the water chamber having atubular extension thereon, an extension connected to said stem andmovable longitudinally within the tubular extension, and a fusiblesubstance connecting 'said extensions. j

28. The combination with a boiler, a burner therefor having a source offluid fuel supply connected thereto, and a cut-off in the fuel supplyhaving an operating stem and means normally operating thereon to closethe cutoff, of a water chamber communicating with the water space of theboiler, a tubular extension projecting into the water chamber and havingthe valve stem movable longitudinally therein, and a fusible substancesealing the tubular extension and forming a connection between thetubular extension and valve stem to prevent operation of the latterwhile the temperature in the water chamber is normal. f

HERBERT CRIPPEN.

Witnesses:

J. B. M. STEPHENS, SARAH W. NEWMAN.

